How To Look At A House
McGarry and Madsen's home inspection blog for buyers of
site-built, mobile/manufactured and modular homes
What is the most common type of roof-to-wall attachment?
Saturday, June 16, 2018
The dominant type of construction in our area of Central Florida is wood stud frame and we are not in a wind-blown debris zone, so a metal clip like the one shown above is the connector most often used. But the type of roof-to-wall fastener used depends on three factors:
- Age of the house - Homes that are 60 years old or more are usually just “toe nailed”—secured only with a nail driven diagonally from the side of the rafter into the top plate. Strap-type connectors came along later, although the early versions would not meet today’s standard for uplift resistance and nailing pattern.
- Wind zone - The high-velocity wind zone requires metal connectors with additional uplift resistance, so South Florida homes are more likely to have double-wraps or something comparable.
- Type of construction - The roof-to-wall connector is usually embedded in the tie beam when it is poured for concrete block construction, whereas wood frame construction utilizes a connector that is nailed to the side of the top plate, so they require different connector designs.
The Wind Mitigation Form, which provides insurance discounts for a hurricane-resistant features of a home, has several categories of roof-to-wall attachment. To read about it, go to our blog post What is the difference between a toe nail, clip, single wrap, and double wrap for the wind mitigation form?
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To learn more about roofs and attics, see these other blog posts:
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